A multi-fuel compound burner

Abstract

This invention discloses a multi-fuel composite burner, applied in the field of fuel burner technology. The key technical features are: a fuel cylinder closed at one end and a flame nozzle coaxially fixed to the open end of the fuel cylinder; an inner flange partition and an outer flange partition are coaxially fixedly connected inside the fuel cylinder from the inside out; a mounting plate is coaxially fixedly connected to the end of the inner flange partition near the flame nozzle; an ultrasonic atomizing component for atomizing liquid fuel is coaxially fixedly connected to the center of the mounting plate; several nozzle assemblies for ejecting combustion gases and at least one igniter are uniformly fixedly connected along the circumference of the mounting plate; a swirl disk for guiding combustion air to form a swirling flow is coaxially fixedly connected between the end of the outer flange partition near the flame nozzle and the fuel cylinder; the technical advantages are: strong adaptability and tolerance to different fuels.

Description

Technical Field

[0001] This invention relates to the field of fuel injector technology, and particularly to a multi-fuel composite injector. Background Technology

[0002] In the fields of industrial production and energy utilization, the performance of combustion equipment is crucial to production efficiency, energy consumption, and environmental protection. With the diversification of energy structures, the drawbacks of traditional single-fuel burners are becoming increasingly apparent. On the one hand, traditional burners can only be adapted to a single type of fuel, lacking flexibility in the face of differences in energy supply in different regions and diverse fuel demands from users. For example, in some areas with unstable natural gas supply, burners that only burn natural gas cannot switch to other fuels, leading to reduced energy supply reliability and easy production interruptions. On the other hand, traditional burners have stringent requirements for fuel quality. When fuel composition and calorific value fluctuate, such as changes in the sulfur content and calorific value of coal, combustion efficiency will drop significantly, and unstable combustion may occur, seriously affecting normal production and increasing energy waste and production costs.

[0003] Furthermore, with increasingly stringent environmental protection requirements, traditional single-fuel burners struggle to achieve clean and efficient energy utilization. Their incomplete combustion generates a large amount of pollutants, such as particulate matter and sulfur dioxide produced by coal combustion, which fails to meet environmental regulations.

[0004] In summary, existing traditional burners have significant shortcomings in terms of fuel adaptability, tolerance to fuel quality, and environmental performance. There is an urgent need to develop a new type of multi-fuel composite burner to solve the above-mentioned technical problems and meet the new demands of industrial production and energy utilization. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-fuel composite burner, which has the advantages of strong adaptability and tolerance to fuels.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a multi-fuel composite burner, comprising a fuel cylinder closed at one end and a flame nozzle coaxially fixedly connected to the open end of the fuel cylinder; an inner flange partition and an outer flange partition are coaxially fixedly connected from the inside to the outside of the fuel cylinder, the inner flange partition and the outer flange partition dividing the fuel cylinder from the inside to the outside into a gas fuel supply chamber, an ignition gas supply chamber and a combustion air supply chamber; a mounting plate is coaxially fixedly connected to one end of the inner flange partition near the flame nozzle, an ultrasonic atomizing component for atomizing liquid fuel is coaxially fixedly connected to the center of the mounting plate, a plurality of nozzle assemblies for spraying combustion gas and at least one igniter for ignition are uniformly fixedly connected along the circumferential direction on the mounting plate, and a swirl plate for guiding combustion air to form a swirling flow is coaxially fixedly connected between the end of the outer flange partition near the flame nozzle and the fuel cylinder.

[0007] The present invention is further configured such that: the ultrasonic atomizing component includes a mounting sleeve coaxially fixedly connected to the mounting plate and a liquid supply pipe coaxially inserted and fixedly connected to the mounting sleeve for supplying liquid fuel; and an atomizing nozzle for atomizing the liquid fuel is coaxially fixedly connected to the end of the mounting sleeve near the flame nozzle.

[0008] The invention is further configured such that: the nozzle assembly includes a plurality of spray holes fixedly connected to the mounting plate along the circumferential direction and a plurality of nozzle blocks fixedly connected to the spray holes; the nozzle blocks are coaxially provided with an air inlet pipe communicating with the gas fuel supply chamber; and the nozzle blocks are uniformly arranged with a plurality of nozzle holes communicating with the air inlet pipe for spraying gas in all directions.

[0009] The present invention is further configured such that the number of nozzle blocks is not higher than the number of nozzle holes, and the dispersion shape and gas density of gaseous fuel entering the flame nozzle are controlled by adjusting the number and arrangement of the nozzle holes.

[0010] The present invention is further configured such that: the swirl plate includes a plate body and a stepped mounting hole opened at the center of the plate body for stably installing the plate body to the end of the outer flange partition; the flame nozzle is based on a sealing flange assembly to press and fix the plate body to the end of the flange partition; and the plate body is evenly provided with a plurality of inclined air ducts along the circumferential direction, the center line of which is inclined relative to the center line of the plate body.

[0011] The present invention is further configured such that: the center line of the inclined air intake hole is inclined at 10-45 degrees relative to the center line of the disk body; the swirl angle of the air swirling into the flame nozzle is controlled by changing different swirl disks; and the intensity of the air swirling into the flame nozzle is controlled by changing the diameter and number of the inclined air intake holes.

[0012] The present invention is further configured such that: the sealing flange assembly includes a first flange coaxially fixedly connected to the open end of the fuel cylinder and a second flange coaxially fixedly connected to the flame nozzle, a sealing gasket is provided between the first flange and the second flange, a plurality of locking screws are uniformly fixedly connected to the second flange along the circumferential direction, the first flange is provided with locking holes that cooperate with the locking screws, and the locking screws are provided with locking nuts.

[0013] The present invention is further configured such that: a gas fuel supply pipe for connecting the gas fuel supply chamber, an ignition gas supply pipe for connecting the ignition gas supply chamber, and a combustion air supply pipe for connecting the combustion air supply chamber are respectively fixedly connected to the fuel cylinder, and at least one gas fuel supply pipe is provided.

[0014] The invention is further configured such that: the closed end of the fuel cylinder is also fixedly connected to a flame scanner tube extending to the mounting plate for scanning the flame in the flame nozzle, and an observation hole for observing the flame is also provided.

[0015] The present invention is further configured such that: the gaseous fuel is natural gas or exhaust gas, and the liquid fuel is fuel oil, waste oil or waste liquid.

[0016] In summary, the present invention has the following beneficial effects: 1. By using inner and outer flange partitions, the fuel cylinder is divided from the inside out into a gaseous fuel supply chamber, an ignition gas supply chamber, and a combustion air supply chamber. At least one gaseous fuel supply pipe is installed in the gaseous fuel supply chamber. During combustion, the gaseous fuel enters the fuel cylinder through the gaseous fuel supply pipe and is ejected by the nozzle assembly. The liquid fuel is atomized by an ultrasonic atomizing assembly and discharged into the flame nozzle. The ignition gas is discharged from the ignition gas supply chamber into the flame nozzle. The swirl plate causes the combustion air to swirl, promoting thorough mixing of fuel and air and improving combustion efficiency. After the fuel is mixed, a high-voltage electric spark is generated by the igniter, thus... The ignition gas then ignites the main fuel, enabling the combustion of one or two liquid or gaseous fuels, or even waste gas and waste liquid. This greatly expands the range of fuels that can be used, reduces dependence on specific fuels, and improves the versatility and flexibility of the equipment. It can also adapt to low-quality fuels and waste fuels, and has better adaptability to fluctuations in fuel composition and calorific value. It can ensure stable operation under different fuel supply conditions, improve the continuity and reliability of production, and achieve precise control of the combustion process by adjusting parameters such as the flow rate and pressure of fuel supply and combustion air, as well as the swirl rate of the swirling fluid, to meet the combustion requirements under different operating conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is an exploded view of the overall structure of this embodiment; Figure 3 This is a cross-sectional view of the overall structure of this embodiment; Figure 4 This is a schematic diagram of the nozzle block in this embodiment; Figure 5 This is a schematic diagram of the swirl disk in this embodiment.

[0018] Reference numerals: 1. Fuel cylinder; 14. Gas fuel supply pipe; 15. Ignition gas supply pipe; 16. Combustion air supply pipe; 2. Flame nozzle; 3. Inner flange partition; 31. Mounting plate; 4. Outer flange partition; 5. Gas fuel supply chamber; 6. Ignition gas supply chamber; 7. Combustion air supply chamber; 8. Ultrasonic atomizing assembly; 81. Mounting sleeve; 82. Liquid supply pipe; 83. Atomizing nozzle; 9. Nozzle assembly; 91. Nozzle orifice; 92. Nozzle block; 93. Air inlet pipe; 94. Nozzle hole; 10. Igniter; 11. Swirl plate; 111. Plate body; 112. Stepped mounting hole; 113. Sealing flange assembly; 114. Inclined air vent; 115. First flange; 116. Second flange; 117. Sealing gasket; 118. Locking screw; 119. Locking nut; 12. Flame scanner tube. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example: refer to Figures 1 to 5 A multi-fuel composite burner includes a fuel cylinder 1 closed at one end and a flame nozzle 2 coaxially fixedly connected to the open end of the fuel cylinder 1. An inner flange partition 3 and an outer flange partition 4 are coaxially fixedly connected sequentially from the inside to the outside of the fuel cylinder 1. The inner flange partition 3 and the outer flange partition 4 divide the fuel cylinder 1 sequentially from the inside to the outside into a gaseous fuel supply chamber 5, an ignition gas supply chamber 6, and a combustion air supply chamber 7. A gaseous fuel supply pipe 14 for connecting the gaseous fuel supply chamber 5, an ignition gas supply pipe 15 for connecting the ignition gas supply chamber 6, and a combustion air supply pipe 16 for connecting the combustion air supply chamber 7 are fixedly connected to the fuel cylinder 1. At least one gaseous fuel supply pipe 14 is provided for introducing various gaseous fuels or gaseous waste into the gaseous fuel supply chamber 5. A mounting plate 31 is coaxially fixedly connected to the end of the inner flange partition 3 near the flame nozzle 2. An ultrasonic device for atomizing liquid fuel is coaxially fixedly connected to the center of the mounting plate 31. The ultrasonic atomizing component 8 atomizes the liquid fuel. Compared with traditional atomization methods, it can atomize the liquid fuel more fully and mix it more evenly with the air, thereby improving combustion efficiency and reducing pollutant emissions. Several nozzle components 9 for spraying combustion gases and at least one igniter 10 for ignition are uniformly fixedly connected along the circumference of the mounting plate 31. A swirl plate 11 for guiding the combustion air to form a swirling flow is coaxially fixedly connected between the outer flange partition plate 4 near the end of the flame nozzle 2 and the fuel cylinder 1. The swirl plate 11 causes the combustion air to swirl, promoting full mixing of fuel and air and improving combustion efficiency. A flame scanner tube 12 extending to the mounting plate 31 is also fixedly connected to the closed end of the fuel cylinder 1 for scanning the flame in the flame nozzle 2. An observation hole for observing the flame is also provided. The flame scanner tube 12 and the observation hole facilitate precise control of the combustion process and meet the combustion requirements under different working conditions. In this embodiment, natural gas or exhaust gas is used as the gaseous fuel, and fuel oil, waste oil, or waste liquid is used as the liquid fuel.

[0021] refer to Figures 1 to 2Specifically, the ultrasonic atomizing component 8 includes a mounting sleeve 81 coaxially fixedly connected to the mounting plate 31 and a liquid supply pipe 82 coaxially inserted and fixedly connected to the mounting sleeve 81 for supplying liquid fuel. At the end of the mounting sleeve 81 near the flame nozzle 2, an atomizing nozzle 83 for atomizing liquid fuel is coaxially fixedly connected. The atomizing nozzle 83 achieves liquid atomization by using the diffraction principle generated when the liquid passes through the gap to generate ultrasonic waves superimposed at the wave crest. Compared with traditional atomization methods, it can make the liquid fuel atomized more fully and mixed more evenly with the air, thereby improving combustion efficiency and reducing pollutant emissions.

[0022] refer to Figure 2 and Figure 4 Specifically, the nozzle assembly 9 includes several nozzle holes 91 fixedly connected to the mounting plate 31 along the circumferential direction and several nozzle blocks 92 fixedly connected to the nozzle holes 91. An air inlet pipe 93 communicating with the gas fuel supply chamber 5 is coaxially opened on the nozzle block 92. Several nozzle holes 94, communicating with the air inlet pipe 93 and used to spray gas in all directions, are evenly arranged on the nozzle block 92. Gas enters through the air inlet pipe 93 and is discharged in all directions from the nozzle holes 94, thereby increasing the dispersion area of ​​the gas fuel and increasing the completeness of gas fuel combustion. The number of nozzle blocks 92 is no higher than the number of nozzle holes 91, based on adjusting the number of nozzle holes 94. The quantity and arrangement of the nozzles 94 control the distribution shape and density of the gaseous fuel entering the flame nozzle 2. When the nozzle block 92 is not installed in the nozzle 91, the gas is discharged in a straight line through the nozzle, with a high gas discharge rate and a large total amount of discharged gas. When the nozzle block 92 is installed, the gas is discharged in a scattered manner, with a low density and a low total amount of discharged gas. By adjusting the number and arrangement of the nozzles 94, the shape and density of the combustion gas entering the flame nozzle 2 can be directly adjusted, so that the gaseous fuel can be fully mixed with the air, and there is also a sufficient amount of combustion gas to mix with the air, thereby increasing the combustion speed and increasing the exhaust gas consumption rate.

[0023] refer to Figure 2 and Figure 5Specifically, the swirl plate 11 includes a plate body 111 and a stepped mounting hole 112 located at the center of the plate body 111 for stably installing the plate body 111 to the end of the outer flange partition 4. The plate body 111 is press-fitted and fixed to the end of the flange partition at the flame nozzle 2 based on the sealing flange assembly 113. Several inclined air intake holes 114 are evenly distributed along the circumference of the plate body 111, with their center lines inclined relative to the center line of the plate body 111. When combustion air is discharged from the inclined air intake holes 114, it is discharged at an inclined angle, thereby generating a swirling flow when the combustion air enters the flame nozzle 2, promoting thorough mixing of fuel and air, and improving combustion efficiency. The center line of the inclined air intake hole 114 is inclined between 10-45 degrees relative to the center line of the plate body 111. The swirl angle of the air entering the flame nozzle 2 can be controlled by changing different swirl plates 11, and the angle can be adjusted by changing the inclination. The diameter and number of the oblique air intake holes 114 are used to control the intensity of the air swirl entering the flame nozzle 2, thereby allowing the swirl intensity of the combustion air to be adjusted according to actual combustion needs, optimizing the mixing effect of fuel and air, and further improving the stability and efficiency of combustion. The sealing flange assembly 113 includes a first flange 115 coaxially fixedly connected to the open end of the fuel cylinder 1 and a second flange 116 coaxially fixedly connected to the flame nozzle 2. A sealing gasket 117 is provided between the first flange 115 and the second flange 116. Several locking screws 118 are uniformly fixedly connected to the second flange 116 along the circumferential direction. A locking hole that cooperates with the locking screws 118 is provided on the first flange 115. A locking nut 119 is provided on the locking screw 118. By disassembling and assembling the locking nut 119, the flame nozzle 2 can be quickly disassembled and assembled to replace the swirl plate 11.

[0024] Brief description of the usage process: During combustion, the gaseous fuel enters the fuel cylinder 1 through the gas fuel supply pipe 14 and is sprayed out by the nozzle assembly 9. The liquid fuel is atomized by the ultrasonic atomizing assembly 8 and discharged into the flame nozzle 2. The ignition gas is discharged from the ignition gas supply chamber 6 into the flame nozzle 2. The swirl plate 11 causes the combustion air to swirl, which promotes the full mixing of fuel and air and improves combustion efficiency. When the fuel is mixed, the igniter 10 generates a high-voltage electric spark to ignite the ignition gas and then the main fuel. This enables the combustion of one or two liquid or gaseous fuels, or even waste gas and waste liquid, which greatly expands the range of fuels that can be used and reduces the dependence on specific fuels.

[0025] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make inventive modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A multi-fuel composite burner, comprising a fuel cylinder (1) closed at one end and a flame nozzle (2) coaxially fixedly connected to the open end of the fuel cylinder (1); characterized in that, The fuel cylinder (1) is coaxially fixedly connected with an inner flange partition (3) and an outer flange partition (4) from the inside to the outside. The inner flange partition (3) and the outer flange partition (4) divide the fuel cylinder (1) from the inside to the outside into a gas fuel supply chamber (5), an ignition gas supply chamber (6) and a combustion air supply chamber (7) from the inside to the outside. The inner flange partition (3) is coaxially fixedly connected with an installation plate (31) at one end near the flame nozzle (2). The installation plate (31) is coaxially fixedly connected with an ultrasonic atomizing component (8) for atomizing liquid fuel at the center. The installation plate (31) is uniformly fixedly connected with a plurality of nozzle components (9) for spraying combustion gas and at least one igniter (10) for ignition along the circumferential direction. The outer flange partition (4) is coaxially fixedly connected with a swirl plate (11) for guiding combustion air to form a swirling flow between the end near the flame nozzle (2) and the fuel cylinder (1). The ultrasonic atomizing component (8) includes a mounting sleeve (81) coaxially fixedly connected to the mounting plate (31) and a liquid supply pipe (82) coaxially inserted and fixedly connected to the mounting sleeve (81) for supplying liquid fuel. The mounting sleeve (81) has an atomizing nozzle (83) for atomizing liquid fuel coaxially fixedly connected to the end near the flame nozzle (2). The nozzle assembly (9) includes several nozzle holes (91) fixedly connected to the mounting plate (31) along the circumferential direction and several nozzle blocks (92) fixedly connected to the nozzle holes (91). The nozzle blocks (92) are coaxially provided with an air inlet pipe (93) communicating with the gas fuel supply chamber (5). The nozzle blocks (92) are evenly arranged with several nozzle holes (94) communicating with the air inlet pipe (93) for spraying gas in all directions. The swirl plate (11) includes a plate body (111) and a stepped mounting hole (112) opened at the center of the plate body (111) for stably installing the plate body (111) to the end of the outer flange partition (4). The flame nozzle (2) is based on the sealing flange assembly (113) to press and fix the plate body (111) to the end of the flange partition. The plate body (111) is evenly provided with a plurality of inclined air vents (114) with the center line inclined relative to the center line of the plate body (111) along the circumferential direction. The centerline of the inclined air intake hole (114) is inclined between 10 and 45 degrees relative to the centerline of the disk body (111). The swirl angle of the air swirling into the flame nozzle (2) is controlled by changing different swirl disks (11), and the intensity of the air swirling into the flame nozzle (2) is controlled by changing the diameter and number of the inclined air intake holes (114). The number of nozzle blocks (92) is no higher than the number of nozzle holes (91). The distribution shape and gas density of the gaseous fuel entering the flame nozzle (2) are controlled by adjusting the number and arrangement of the nozzle holes (94). The sealing flange assembly (113) includes a first flange (115) coaxially fixedly connected to the open end of the fuel cylinder (1) and a second flange (116) coaxially fixedly connected to the flame nozzle (2). A sealing gasket (117) is provided between the first flange (115) and the second flange (116). A plurality of locking screws (118) are uniformly fixedly connected to the second flange (116) along the circumferential direction. A locking hole that mates with the locking screw (118) is provided on the first flange (115). A locking nut (119) is provided on the locking screw (118). The fuel cylinder (1) is fixedly connected to a gas fuel supply pipe (14) for connecting the gas fuel supply chamber (5), an ignition gas supply pipe (15) for connecting the ignition gas supply chamber (6), and a combustion air supply pipe (16) for connecting the combustion air supply chamber (7). At least one gas fuel supply pipe (14) is provided.

2. The multi-fuel composite burner according to claim 1, characterized in that, The closed end of the fuel cylinder (1) is also fixedly connected to a flame scanner tube (12) that extends to the mounting plate (31) for scanning the flame in the flame nozzle (2), and also has an observation hole for observing the flame.

3. A multi-fuel composite burner according to any one of claims 1-2, characterized in that, Gaseous fuels use natural gas or exhaust gas, while liquid fuels use fuel oil, waste oil, or waste liquid.

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